A ball is projected inside a room of height 7m with a speed of and at an angle of 37^(@)with horizontal. If its collission with ceiling results in reversal of direction only of y-component of velocity. What is the total time of flight (in sec) till in strikes floor.......

A ball is projected inside a room of height 7m with a speed of and at

1.	A ball is projected inside a room of height 7m with a speed of and at an angle of 37^(@)with horizontal. If its collission with ceiling results in reversal of direction only of y-component of velocity. What is the total time of flight (in sec) till in strikes floor.......
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